Laboratory Information
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Zirkonzahn
Image from Safirdental Laboratory Zirkonzahn Rom
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Why using Prettau Zirconia?
A reoccurring issue in our professional circles is the question whether solid, full-contour Zirconia crowns are at all indicated in the view of aesthetics, abrasion characteristics, compatibility and strength. Can we recommend them to our patients? As far as (full-anatomical-contour) solid Zirconia restorations are concerned, we all agree that a special translucent Zirconia material is needed first. For this reason we have developed the highly translucent Prettau Zirconia which is used in conjunction with a specialized colouring technique that eliminates the use of veneer ceramics entirely. In this way, aesthetically pleasing full-Zirconia (FZ) restorations, i.e. the ‘Prettau Bridge’ can be realized.
Especially in the field of implant dentistry, in cases of limited available space or restorations with tissue flanges, Prettau Zirconia comes into a world of its own. One of the many advantages is the complete elimination of posterior occlusal chipping because only the labial or buccal surfaces are porcelain veneered; all functional areas are maintained as solid Prettau Zirconia.
General information about Prettau Zirconia*
Prettau Zirconia is used to realize all kind of restorations. Zirconia is the result of a chemical process: the basis is Zirconia sand, partially stabilized with Yttrium, and made into Zirconia blanks through a mechanical process. Zirconia dioxide is, among the today available dental ceramics, without any doubt the material with the highest stability and fracture toughness.
Zirkonzahn offers, thanks to an optimized microstructure of the Zirconia dioxide, extra translucent Prettau Zirconia. In combination with Prettau Colour Liquids and the stains you can create full Zirconia bridges, eliminating ceramic chipping.
Higher translucency thanks to the Zirconia‘s* optimized microstructure
No ceramic chipping
No abrasion vis-a-vis the antagonist tooth
200% higher flexural strength thanks to the eliminiation of the veneer ceramics
Ideal especially in case of implants, reduced available space or restoration with gingival reconstruction
Full automatic milling system M5
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* 5-axis milling machine Flexible and in step with future developments
* Open system * 5 + 5 axes milling technology * Multi-purpose applications: Crown & bridge, models, occlusally-screwed bridges, abutments, bars, attachments, etc. * Blank height up to 30 mm * Compatible with future developments i.e. plasma, airbrush, laser, sandblast, etc. * Simultaneous functions of scanning, designing and milling * Up to date with the latest technical developments through ongoing innovative software updates
User friendly and purpose oriented * Developed by a dental technician for dental technicians * Visual milling progress monitoring through multi-coloured LED display * Online-supervision, programming and control by * * Smartphone and internet access possible
Modular technology in detail * Uncomplicated system, safe & easy to upgrade through special modular concept design * System can accommodate different specialized heads for milling zirconia, ceramics or metal (stainless steel or titanium) * System can be equipped with up to five milling heads * Future technologies can be integrated i.e. plasma, airbrush or laser * Materials possible for milling: At present: * Presintered zirconium dioxide, presintered aluminium oxide, resin and wax. In future: Metal and ceramics |
Dental abrasive measurements Prettau Zirconia
By contrast veneer porcelain (or even metal) will cause wear on natural dentition due to its highly porous structure which acts like sandpaper.
To illustrate this phenomenon by a practical example: Rub wood against a smooth glass pane and nothing will happen but, rub wood against wood and it will splinter. As two materials of the same kind meet (tooth against tooth), natural dentition will inevitably wear also. However, when natural tooth meets smooth Zirconia (like wood against glass) no abrasion occurs.
The abrasive nature of any material is determined by its degree of surface polish and inherent density.
The ”softer” enamel will glide over polished, much harder Zirconia without wear.
Schematic view of the abrasion in the indenter according to each sample
Prettau Zirconia work examples
We have a lot of work examples. Click here to see what our Zirconia expertsare doing or have a look at our work examples :
100% Prettau Bridge with Zirconia Screw Thread by the Screw-Tec-System
100% Prettau Zirko - Made by CAD/CAM (Insert 23)
Here you can find more interesting articles about Prettau Zirconia work experiences.
Prettau Zirconia products
Our 14 Zirconia blanks are available in 5 different heights: 16 mm, 22 mm, 30 mm, 40 mm and
50 mm.
You can use the Zirconia blanks for manuel milling and also for CAD/CAM milling. Find out more about our products here.